I posted some pictures of the Middle North Falls in another thread, so I thought I'd post a few from North Falls (there's a Lower North Falls and a Upper North Falls but North and Middle are the best ones). North Falls is the first falls you run into after leaving the trail head and take the down stream trail. You have to go down a bunch of cement stairs then under some rocks where my backpack scapped if I had it on. You then go behind North Falls where it was worn out over the years. It makes for a nice cool place in the summer and gives a good view down stream.
This shot is a 3 shot panorama stitched together. Taken in the vertical position on my 10D and 24-70 2.8L lens.
This is what the North Falls looks like from the side. The undercut under the rock is actually deeper and bigger than it looks from this vanatage point.
Mike